US 12,189,341 B2
System for driving and holding in position a mobile unit for displaying time or time derivative information
Christian Fleury, Geneva (CH); and Florent Millet, Geneva (CH)
Assigned to ROLEX SA, Geneva (CH)
Filed by ROLEX SA, Geneva (CH)
Filed on Oct. 13, 2021, as Appl. No. 17/499,905.
Claims priority of application No. 20201888 (EP), filed on Oct. 14, 2020.
Prior Publication US 2022/0113678 A1, Apr. 14, 2022
Int. Cl. G04B 19/253 (2006.01); G04B 11/00 (2006.01)
CPC G04B 19/25373 (2013.01) [G04B 11/006 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system for driving and holding in position a mobile unit for displaying time or time derivative information, comprising:
a driving device for driving the mobile unit, the driving device comprising a driving cam and a driving lever provided to drive a driving member,
a device for holding the mobile unit in position,
a device for activating and deactivating the position-holding device comprising a deactivation cam, and
a device for mechanically coupling or synchronizing the driving cam and the deactivation cam, wherein the mechanical coupling or synchronizing is one-to-one so that, in each driving phase actuated by the driving cam, at a time when the driving cam causes the driving member to drive the mobile unit, the device for mechanically coupling or synchronizing causes the deactivation cam to hold the position-holding device in a deactivated state.